Move incubation branding requirements into handbook
@wbeaton
Submitted by Wayne Beaton Link to original bug (#488421)
Description
The handbook already includes much of the content in the "Project Phases" section. This should be pulled out into its own section.
https://www.eclipse.org/projects/handbook/#starting-project-phases
The wiki page should be scavenged for any other germane information and retired.
https://wiki.eclipse.org/Development_Resources/HOWTO/Conforming_Incubation_Branding